Preparation and applications of some complexes derived from lanthanon(III) ions with some ligands derived from pyrazole

Authors

  • Adel S Orabi Suez Canal University

DOI:

https://doi.org/10.20450/mjcce.2013.123

Keywords:

Lanthanon(III) solid complexes, catalytic activity, antibacterial properties, thermal and conductivity properties, simulated molecular structure

Abstract

The novel complexes derived from some pyrazole derivatives ligands: 2,4-dihydroxybenzylidene-3`-imino-5`-methylpyrazole(L1); salicylidene-3`-imino-5`-methylpyrazole(L2); 2-hydroxynaphthylidene-3`-imino-5`-methylpyrazole(L3) and LaCl3, Ce(NO3)3 and Nd(NO3)3 were prepared and characterized using elemental analysis (C, H,  N, M%), mass, FT-IR spectroscopy, electrical conductivity and thermal gravimetric analysis (DTA/TG). The electrical conductivity of 0.001M in DMSO revealed the electrolytic behavior of the all formed complexes as 1:1 (coordination sphere cation : ionization sphere ions) electrolyte for complexes derived from L1 and L2 ligands meanwhile L3 gave 1:2 electrolyte. The thermal analysis (DTA/TG) of the synthesized complexes revealed the presence of two types of water molecules as water of crystallization and coordinated one which act as a ligand. The complexes formed could be formulated as [M(L)2.nH2O].Z.mH2O for L = L1 and L2, [M(L).nH2O].2Z.mH2O for L = L3 (Z = Cl- for M = La(III) and Z = NO3- for M = Ce(III) and Nd(III)). Nd(III)-L3 complexe exhibit promising catalytic activity towards the aerobic oxidation of p-phenylenediamine (PPD) to the corresponding semi-oxidized form (PPD+). The antimicrobial activity of the complexes under investigations was tested and discussed. The simulated molecular structure and the energy of the formed complexes were performed using chem.-office package program. The relation between the spatial arrangement of the formed complexes and its antimicrobial activity was evaluated.

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Published

2013-06-15

How to Cite

Orabi, A. S. (2013). Preparation and applications of some complexes derived from lanthanon(III) ions with some ligands derived from pyrazole. Macedonian Journal of Chemistry and Chemical Engineering, 32(1), 25–39. https://doi.org/10.20450/mjcce.2013.123

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Section

Inorganic Chemistry